27 February 2014 Effective receiving area of the antenna-coupled terahertz detector
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Optical Engineering, 53(2), 023103 (2014). doi:10.1117/1.OE.53.2.023103
Abstract
In order to accurately characterize the radio frequency (RF) responsivity of the antenna-coupled detector in the terahertz (THz) band, we introduce an iterative deconvolution algorithm to extract the effective receiving area. We use this method to characterize an antenna-coupled Nb 5 N 6 microbolometer as an example. The effective receiving area is approximately 0.7  mm 2 , which is 7.4 times larger than the physical area of the detector. The RF responsivity of the Nb 5 N 6 microbolometer is 480  V/W at 0.28 THz, including the effect of the antenna coupling and the substrate interference. This work offers an effective way to characterize antenna-coupled THz detectors and to analyze the element-to-element spacing along two orthogonal directions in THz focal plane array chips.
© 2014 Society of Photo-Optical Instrumentation Engineers (SPIE)
Qingkai Mao, Xuecou Tu, Lei Xu, Chao Wan, Lin Kang, Jian Chen, Peiheng Wu, "Effective receiving area of the antenna-coupled terahertz detector," Optical Engineering 53(2), 023103 (27 February 2014). http://dx.doi.org/10.1117/1.OE.53.2.023103
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KEYWORDS
Terahertz radiation

Sensors

Microbolometers

Niobium

Antennas

Signal detection

Deconvolution

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